SUSTAINABLE DRAINAGE SYSTEMS 2019 SuDS 3 INTRODUCTION TO AGGREGATE INDUSTRIES

Aggregate Industries are at the frontline of the construction and infrastructure industries, CONTENTS producing and supplying an array of construction materials. With over 330 sites and more than 4,100 Introduction 4 - 5 dedicated employees, we’re home to everything The Need for Sustainable Drainage Solutions 6 - 7 from aggregates, asphalt, ready-mixed concrete Types of SuDS 8 - 9 and precast concrete products. Product and Applications 10 - 19 In addition to producing, importing, exporting and Example Solutions 20 supplying construction materials we also offer national Designing SuDS Pavements 22 - 31 road surfacing and contracting services. Our complete Construction, Installation and Maintenance 32 - 39 range of products will help you work sustainably, safely, professionally and profitably. It’s all of this that puts us Case Studies 40 - 47 at the heart of construction.

We are a proud member of LafargeHolcim, which is the APPENDICES leading global building materials and solutions company Technical Specifications 50 - 60 with around 80,000 employees in over 80 countries. It holds leading positions in all regions with a balanced Guidance and Legislation 61 portfolio of developing and mature markets. Aggregate Industries The Complete Service 62

Our Sustainable Drainage System (SuDS) solutions range offers a comprehensive choice of options to both reduce flood risk and to control and minimise pollution before it enters our watercourses, enabling us to use water in a more sustainable and environmentally beneficial way. 4 SuDS OUR SuDS SOLUTIONS WORK BY SuDS WITH TEMPORARILY RETAINING AND SLOWLY RELEASING RAINFALL AGGREGATE INDUSTRIES BACK INTO THE WATERWAYS IN A

Ever-changing weather systems, increasing CONTROLLED MANNER urbanisation and rapid run-off have put a tremendous strain on conventional storm water drainage systems. This has resulted in sewers and culverts becoming overloaded, causing floods and contaminating natural waterways.

Sustainable Drainage Systems (SuDS) provide an alternative approach to traditional drainage systems. They mitigate many of the adverse impacts of storm water run-off on the environment in terms of both volume and pollutants.

Aggregate Industries have been at the forefront of research work regarding materials for use in SuDS solutions. Initially as part of the research team contributing to PPR 482-A pilot scale trial of reservoir pavements for Drainage Attenuation published by the Transport Research Laboratory (TRL) investigating the use of SuDS solutions. This subsequently contributed to HD221/18 within the Design Manual for Roads and Bridges. More recently we also contributed to CIRIA’s C753 document – “The SuDS Manual” published in December of 2015.

Our SuDS solutions work by temporarily retaining and slowly releasing rainfall back into the waterways in a controlled manner. This helps prevent floods, while allowing natural processes to break down pollutants which would otherwise impact further downstream.

SuDS became a legal consideration for all new developments per the Flood & Water Management Act 2010 and was integrated into Building Regulations in 2015. 6 SuDS SuDS 7

Flood potential Pollution Climate changes

As development increases, so do run-off Traffic, hard surfaces and increased run-off It is generally accepted that the UK’s climate speeds and volumes. Their rapid delivery can increase the risk of pollutants, which are is changing and that our weather is becoming into the local water courses can cause literally washed off the streets into the water more extreme. Paradoxically, in the short THE NEED FOR flooding downstream, resulting in danger catchment, contaminating the downstream term, it is not the overall levels of rainfall that to life and damage to property, or erosion water supply. influence the need for sustainable drainage, and destruction of natural habitats. but the ferocity and frequency of the single rainfall events that may cause flooding. SUSTAINABLE These, combined with on-going development, DRAINAGE SOLUTIONS add to the necessity for SuDS solutions.

Natural Agricultural Suburban Inner City

5% 30% 70% 95% run off run off run off run off

95% infiltration 70% infiltration 30% infiltration 5% infiltration

Infiltration and run-off

Naturally vegetated, rural ground is permeable and has the capacity to absorb high levels of rainfall through its surface -’infiltration’ - and to release the infiltrated water gradually into natural water courses.

Development of this ground can greatly reduce permeability by the introduction of hard surfaces - asphalt, paving concrete and the compaction caused by plant or vehicular movement. Less water infiltrates the ground and more water runs off the surface, more rapidly.

Traditionally, to avoid local flooding, surface run-off has been drained into underground pipe systems and delivered elsewhere into the water catchment area.

Key benefits }} Storm water management - high permeability and drainage capacity }} Environmental management - minimises urban impact on natural water cycle }} Reduces costs as part of a Sustainable Drainage Systems SuDS }} Available with integral colour to offer decorative and functional hard landscaping opportunities }} Eliminates the need for retention ponds }} Offers potential space saving for efficient land development }} Mitigates surface pollutants }} Reduces glare from wet pavement }} No standing water, lessens risk of hydroplaning

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 8 SuDS SuDS 9 TYPES OF SuDS

ENGINEERED OR HARD LANDSCAPING Engineered SuDS can be split into two different types:

}} Permeable surfaces }} Mix of permeable and impermeable materials

THE KEY SuDS PRINCIPLES 1. SOURCE CONTROL Sustainable drainage systems control surface water run-off as close to its origin as possible. This is termed ‘source control’.

This minimises changes in the volume and rate of surface run-off from developed sites and thereby minimises flood risk and other environmental damage.

Additionally, SuDS may offer an element of pollution control as well as ‘attenuation’ – where infiltrated water is stored before its controlled release. PERVIOUS SURFACES 2. MANAGEMENT TRAIN Pervious surface systems include permeable or porous surfaces to car parks, roads, hardstandings and pedestrian areas. Any area These levels of control and treatment result from a series of covered by a hard surface can be turned into a permeable surface techniques (‘management train’) that integrate with one another and incorporated into a sustainable drainage design. to gradually reduce levels of pollution, volume and flow rate prior to discharge. Infilta block (page 14) and SuperDrainasphalt (page 15) are products typical of these types of systems and when incorporated into an 3. WATER QUALITY urban SuDS development, they enhance the urban landscape. A Removing pollution from run-off is an important part of SuDS study by HR Wallingford determined that pervious surfaces are one design. The use of SuDS to control pollution and replace oil of the most effective and space efficient methods of incorporating separators is highlighted in the most recent edition of Pollution SuDS into developments designed to comply with Planning Policy Prevention Guideline PPG 3 published by the Environment Guidance 3, requiring a high density of housing to be provided on Agency (2006). new developments.

4. AMENITY AND BIODIVERSITY Even if there is contamination, the use of SuDS is still possible }} Many brownfield sites are only marginally contaminated providing that care is taken in its design to avoid mobilising pollution and the contamination may be in a non-leachable form. Trees are an important element in the biodiversity of urban areas into the surface or groundwater. The use of shallow SuDS such as Often, this does not pose a significant risk to groundwater and improve amenity by providing enhanced aesthetics, cooling the Aggregate Industries’ systems should limit the need for the deep when SuDS are used. and shading. Aggregate Industries’ SuDS methods can be designed excavations that are commonly required with conventional drainage. to protect and enhance the health of existing and new trees by protecting the roots systems and providing irrigation and aeration All contaminated sites are different and the level of contamination GREEN AND SOFT LANDSCAPING to the soil. can vary from slight to high. Therefore, each site should be Swales, ponds, wetlands and similar methods are classed as

assessed on its own merits considering the following: green/soft landscaping and many SuDS schemes involve their use. The key considerations can be summarised as follows: The Charcon systems provided by Aggregate Industries can be }} Prevent mobilisation of contamination and its transportation }} Water quantity used as part of soft landscaping systems. It is bad SuDS practice to receiving waters. This means infiltration cannot be used if to direct untreated run-off into ponds or wetlands as it will reduce }} Water quality soils contain contaminants in a form that can be leached out. their contribution to biodiversity and landscape value. }} Amenity benefit If such soils are present, then infiltration may still be used if it occurs below the base of the contaminated soils.

}} Prevent the flow of contaminated groundwater into the SuDS solution. Such flow is unlikely with the shallow Aggregate Industries systems. IMPERMEABLE SURFACES }} Use features that minimise excavation and disposal to keep Impermeable surfaces can accommodate SuDS solutions using a costs down. The excavation and disposal of contaminated proprietary system available in the market. soils is expensive, especially in the South East of England. Shallow SuDS features such as permeable pavements minimise excavations giving considerable cost savings.

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 10 SuDS PRODUCT AND APPLICATIONS

Product and application selection 12 Charcon 14 Asphalt 15 Aggregates 16 Ready-mixed concrete 18 Lytag 19 Solutions 20 12 SuDS SuDS 13 PRODUCT AND APPLICATION SELECTION

SHARED SURFACE, MEWS RESIDENTIAL ESTATE RESIDENTIAL DISTRIBUTOR PEDESTRIAN AREAS, LOCATION COURTS, CUL-DE-SACS DRIVEWAYS AND ACCESS ROADS AND COLLECTOR ROADS, SWALES SPORT PITCHES FOOTPATHS AND HOME ZONES (MAX. 20MPH) (MAX. 30MPH) Grassgrid Grassgrid Grassgrid Grassgrid Hydromedia Hydromedia Infilta Hydromedia Water Transmission Layer Infilta Infilta Infilta Grassgrid Infilta SuperDrainasphalt SuperSport SuperDrainasphalt SuperDrainasphalt SuperDrainasphalt SuperDrainasphalt SuperSport Lytag Water Storage SuperFlow Aggregates SuperFlow Aggregates SuperFlow Aggregates SuperFlow Aggregates SuperFlow Aggregates SuperFlow Aggregates SuperFlow Aggregates

LOCATION LORRY PARKS INDUSTRIAL ESTATE ROADS CAR PARKS ROOFS BASEMENTS PODIUM DECKS

Hydromedia Hydromedia Infilta Infilta Hydromedia Hydromedia Water Transmission Layer Infilta Infilta SuperDrainasphalt Grassgrid Infilta Infilta SuperDrainasphalt SuperDrainasphalt

Water storage SuperFlow Aggregates SuperFlow Aggregates SuperFlow Aggregates Lytag SuperFlow Aggregates Lytag

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 14 SuDS SuDS 15 CHARCON ASPHALT

OVERVIEW OF CHARCON HARD LANDSCAPING OVERVIEW OF ASPHALT Charcon Infilta permeable paving is available in a range of sizes and Aggregate Industries manufactures and supplies British and European standardised asphalts as well as a comprehensive range of Performance finishes to suit all applications. The invisible nib profile creates joints Asphalts to meet a wide range of applications. that allow fast and efficient water entry into the sub-base SuDS solution below. The combination of hidden nibs, range of surface Our porous asphalt range includes SuperDrainasphalt and SuperSport which offer highly durable and effective transition layers, allowing water to colours and finishes of the Infilta paving range creates flow quickly to the storage area below. These products come in various aggregate sizes to suit a range of applications and can be combined with an aesthetically pleasing surface finish for all applications. our wide range of other sustainable drainage products to offer the perfect Sustainable Drainage Systems solution. Designed to reduce the potential impact of surface water drainage in new and existing developments.

PRODUCTS }} SuperDrainasphalt is a product that has been developed for use within a SuDS system }} Andover Textured Infilta }} Low environmental impact surfacing }} Stonemaster Infilta (Washed and Cast finish) }} Durability maximised by careful mix design and use of carefully selected binders }} Woburn Infilta (Rumbled and Original) }} SuperDrainasphalt and SuperSport offer high hydraulic conductivity levels }} Europa Infilta }} For certain applications SuperDrainasphalt and SuperSport can be supplied in a range of colours }} Infilta is available in a range of sizes, colours and finishes PRODUCTS }} SuperDrainasphalt 32 }} SuperSport 20 }} SuperDrainasphalt 20 }} SuperSport 14 }} SuperDrainasphalt 14 }} SuperSport 10 }} SuperDrainasphalt 10 }} SuperSport MUGA }} SuperDrainasphalt 6 }} SuperSport Tennis

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 16 SuDS AGGREGATES

OVERVIEW OF AGGREGATES The SuperFlow product range is Aggregate Industries’ line of high performance aggregates specifically designed to provide controlled water management within SuDS.

PRODUCTS

SuperFlow SuDSAgg SuperFlow 63

}} Aggregate Type: 0/40mm crushed rock }} Aggregate Type: Coarse crushed angular rock }} Application: Sub-base reservoir layer }} Application: Lower sub-base reservoir / capping layer }} Drainage Solution: SuperDrainasphalt and Hydromedia }} Drainage Solution: Infilta Block Paving

SuperFlow SuDSAgg is a well graded, reduced fines, crushed SuperFlow 63 is a robust starter aggregate which works as the aggregate with a maximum nominal size of 40mm. SuperFlow initial lower reservoir or capping layer within the SuDS pavement SuDSAgg is designed to meet the structural requirements of a construction. The product offers optimal voids due to its angular Foundation Class 2 material as defined in the Design Manual shape allowing for controlled water storage and flow, while it’s for Roads & Bridges, with a void content of 30% or greater to natural strength ensures the long term integrity of the SuDS ensure optimal water management. Its structural stability means solution is maintained. it can be used independently or as a stabilisation layer over Aggregate Industries’ SuperFlow 20 when used under paver SuperFlow 6 laid SuperDrainasphalt. }} Aggregate Type: 2/6 Crushed angular stone Working in partnership with our in-house surfacing division, Aggregate Industries can offer the complete asphalt }} Application: Laying course / bedding aggregate SuDS solutions. }} Drainage Solution: Infilta block paving

Aggregate Industries SuperFlow 6 is a high performance laying SuperFlow 20 course aggregate specifically designed to provide controlled water }} Aggregate Type: 4/20mm crushed angular rock management within Sustainable Drainage Systems (SuDS). }} Application: Upper sub-base reservoir layer SuperFlow 6 provides a stable flat laying surface, while retaining }} Drainage Solution: Hand laid SuperDrainasphalt, the optimal level of voids for consistent water flow. This carefully Infilta Block Paving and Hydromedia graded aggregate, with it’s natural strength and interlocking properties ensures both the long term integrity of the pavement SuperFlow 20 is a coarse graded aggregate produced to British and the excellent drainage characteristics are maintained. European standard and works as a reservoir sub-base layer, offering controlled rain water retention within the SuDS pavement SuperFlow JointAgg construction. SuperFlow 20’s specific grading and low degradation value results in a durable material which is easy to place and }} Aggregate Type: Crushed stone grit compact, while ensuring water flow is slowed and released in }} Application: Brushing in grit aggregate a more sustainable and environmentally friendly manner. }} Drainage Solution: Infilta block paving The excellent physical properties and drainage characteristics of SuperFlow 20 make it an integral component to many Aggregate Industries SuperFlow JointAgg is a high performance Sustainable Drainage Systems. finishing aggregate specifically designed for brushing into block pavement joints. This aesthetically pleasing product offers excellent free draining characteristics due to its low fines content, while it’s natural strength ensures the long term integrity of the SuDS is maintained for a refined, yet functional pavement finish.

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 18 SuDS SuDS 19 READY-MIXED CONCRETE LYTAG

OVERVIEW OF READY-MIXED CONCRETE OVERVIEW OF LYTAG Hydromedia® is an ideal solution for surface and storm water management. It’s a fast draining, engineered concrete pavement solution that rapidly Lytag has been supplying lightweight aggregate for over 60 years and has sold in excess of 16 million tonnes of material. Manufactured in directs storm water off streets, parking surfaces, driveways and walkways. It minimises costs and long-term maintenance for local authorities and accordance with EN 13055, the standard for lightweight aggregates, Lytag is widely available within the UK and Europe. developers of storm water management and there are a range of strengths available. Designed with a sub-base to contain typically 30% voids, water flows freely through Hydromedia ranging from rates of 150 - 1000 litres/minute/m2. Made from pulverised fuel ash, a waste material produced from electricity production in coal-fired power stations, the aggregate is called ‘sintered pulverised fuel ash lightweight aggregate’, but more commonly known as Lytag.

PRODUCTS Lytag products are classified as secondary aggregates. This means that the quantity of fly ash being tipped is reduced and virgin aggregate There are four prime versions of Hydromedia in the product range: extraction is reduced. By considering the use of Lytag products at an early stage in the design process, you have the potential to reduce the quantities of construction material required in a project. This leads to overall cost savings. Due to the reduced weight of Lytag products, larger }} Hydromedia® pedestrian – No traffic applications volumes can be transported, reducing vehicle movements both on the public highway and site. }} Hydromedia® car park – Light traffic conditions }} Hydromedia® underlayer – Non traffic PRODUCTS }} Hydromedia® underlayer – Light traffic Geofill

A range of strengths are available. Please speak to our technical specialists to find out which grade suits your project. An 8/14mm lightweight aggregate used to raise levels or reduce pressure on retaining walls. Due to its shape and absorptive qualities, it will initially absorb up to 20% of the geofills weight in water, followed by letting water pass through without silting up.

Sportag

A 4/8mm material used extensively in sports pitches and golf courses, acting as localised water run-off channels.

Hortag

A 4/8mm material used within the horticulture market, available in small bags for use in garden drainage as well as improving root growth.

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 20 SuDS EXAMPLE SOLUTIONS

For further advice and additional options contact your Aggregate Industries SuDS specialist.

Infilta SuperFlo eotetile ointAgg SuperFlo Ipereale suase Ipereale SuperFlo recast er in Ipereale harcon er edding ayer eoerane granular Asphalt Aggregate concrete haunch eoerane For attenuation only

eotetile

SuperDrainasphalt SuperDrainasphalt SuperFlo Ipereale Asphalt Ipereale harcon er Surface ourse inder ourse SuDSAgg eoerane For attenuation only

eotetile

Infilta SuperFlo ointAgg SuperFlo eotetile SuperFlo Ipereale harcon er edding Aggregate eoerane ayer For attenuation only

eotetile

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 22 SuDS DESIGNING SuDS PAVEMENTS

Preliminary considerations 24 Key considerations 25 Hydraulic design 25 Hydraulic considerations 27 Pollution control 28 Use of Geotextiles and Geomembranes 30 Permeable pavements on sloping sites 31 24 SuDS SuDS 25 PRELIMINARY KEY CONSIDERATIONS

Typical SuDS pavement design has three key design considerations: CONSIDERATIONS }} Hydraulic design - to provide sufficient water storage capacity }} Structural design - to meet traffic loading requirements. Please consult [email protected] for advice and guidance }} Pollution control - specification of materials to treat pollutants and prevent their entry into the water course Aggregate Industries offer five pervious pavement systems for use in areas that require a pervious hard surface (Infilta, SuperDrainasphalt, Grassgrid, Hydromedia, a combination of impermeable and permeable solutions).

The wide range of Aggregate Industries SuDS solutions means that a system can be designed to cover all situations and site constraints. Design considerations include:

LAND USE CHARACTERISTICS CATCHMENT CHARACTERISTICS HYDRAULIC DESIGN }} Which SuDS techniques are best suited for the proposed }} Are there are any regulatory requirements that restrict or prevent land use of the area draining to the system? the use of a particular SuDS technique, or that may impose There are four key criteria to consider: For example, is there an exceptionally high silt load? additional requirements on the performance? }} Water entry }} Is the site contaminated? }} In particular, is the site in a groundwater source protection zone? }} Infiltration or attenuation This will affect the level of treatment required The Environment Agency will require a high level of treatment in }} Rainfall (rainfall against catchment area) the outer source protection zone and are likely to prevent the use }} Outflow and drainage }} What are the soil conditions and strength of sub-grade? of infiltration within inner source protection zones for more highly Ideally a site investigation report will identify the nature polluting uses of the ground and the groundwater levels. The infiltration THE PERVIOUS PAVEMENT CONCEPT rate of the soils should be determined by testing. Normally, }} Is the site near a SSSI (Site of Special Scientific Interest) or SAC clay soils are not suitable for any significant infiltration (Special Area of Conservation)?

}} Are receiving waters used for recreation? trato arta trato tteuato SITE CHARACTERISTICS If so, a higher level of treatment will be required Not all components will be suitable for all sites and the criteria critical to the project should be identified at an early stage. PERFORMANCE REQUIREMENTS Aggregate Industries pervious system }} Are there are any site characteristics that may restrict }} Is there a particular pollutant of concern that requires treatment? or prevent the use of a particular SuDS technique? For example, in industrial sites there may be a particular chemical used that could pollute run-off and will require }} Is the site subject to heavy vehicular traffic? treatment (e.g. formaldehyde in chipboard factories) Aggregate Industries Storage Requirement Storage Requirement Storage Requirement SuperFlow Aggregate }} Does the site slope? }} Will one technique meet all design requirements? This will affect the ease of use of permeable surfaces

}} What space is available for SuDS? All Aggregate Industries Sustainable Drainage Systems are space efficient and do not require extra landtake Geotextile Geomembrane

Speed of infiltration Speed of outflow

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 26 SuDS SuDS 27 HYDRAULIC HYDRAULIC DESIGN CONSIDERATIONS

Water entry, infiltration speed, rainfall intensity, duration and frequency will be relevant to the type of SuDS required. The first step The proposed site location within the UK will be relevant to the type of rainfall that the SuDS will have to cope with. It’s important in designing SuDS pavements is to establish the method of water entry so that an economic pavement structure can be designed. to establish the recurrence of storms of different durations so that the optimum pavement solution can be designed.

PERVIOUS PAVEMENTS RAINFALL AMOUNT The hydraulic design must consider the infiltration rate of the hard surfacing (i.e. the rate at which rainfall will be able to enter the aggregates – see Annual Average, 1981 - 2010 Fig 1). This needs to be greater than the rate of rainfall that an area is designed to drain. It is also normal practice to allow a 90% reduction in the ‘as new’ infiltration rate to allow for clogging. Hydraulic conductivity is a measure of surface infiltration rate and this has been measured at a number of sites where Aggregate Industries’ permeable surfaces are installed. All permeable SUDS systems supplied by Aggregate Industries can be designed to meet the expected storm water requirements of the UK allowing it to pass directly into the underlying aggregates (all except Grassgrid AVERAGE VALUE (mm) have, as new, rates greater than 5000 mm/h). >3000

2000 to 3000

1500 to 2000

1250 to 1500

1000 to 1250

800 to 1000

700 to 800

600 to 700

<600 SuperDrainasphaltDrainAsphalt 32 32 SuperDrainasphaltDrainAsphalt 14 14 DrainAsphalt 6 >15,000 mm/h/m& 2 >12,000 mm/h/m& 2 SuperDrainasphalt>5,000 mm/h/m2 6 SuperDrainasphalt 20 SuperDrainasphalt 10 >5,000 mm/h/m2 >15,000 mm/h/m2 >12,000 mm/h/m2

Hydromedia In lta Grassgrid >5,000Hydromedia mm/h/m2 >5,000Infilta mm/h/m2 Grassgrid >500 mm/h/m2 >5,000 mm/h/m2 >5,000 mm/h/m2 >500 mm/h/m2

Fig 1. Water entry rate for Charcon pervious surfaces hydraulic conductivity

© Crown copyright, Met Office.

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 28 SuDS SuDS 29 POLLUTION CONTROL

DEALING WITH POLLUTION AT SOURCE POLLUTION REMOVAL PERFORMANCE GEOTEXTILE (I.E. PERMAFILTER) Permeable surfaces are an excellent means of removing pollution The pollution removal performance of a wide range of pervious Geotextile (i.e. Permafilter) is a non-woven, dimpled, needle punched geotextile that has been specifically designed for hydrocarbon pollution from urban run-off. The main reason for this is that the pollution surfaces has been measured on installed pavements both in the treatment in civil engineering applications (such as filtration separation, drainage, protection and reinforcement). The entrapped hydrocarbons is dealt with at source before it becomes concentrated, entrained UK and worldwide. The results show their effectiveness in removing can be biodegraded by naturally occurring micro-organisms providing a self-cleansing mechanism. and emulsified within the run-off, which can occur in conventional metals and hydrocarbons as well as the beneficial effect on the piped systems. concentrations of phosphorous and nitrogen in run-off. CHARCON GEOTEXTILE (I.E. PERMAFILTER) Pervious pavements provide such efficient pollution removal Geotextile (i.e. Permafilter) has been The hydrophobic (water repelling) material Examples for applications using POLLUTION REMOVAL MECHANISMS because there are a number of mechanisms at work within specifically designed to retain hydrocarbon receives and retains the hydrocarbon Geotextile (i.e. Permafilter): The systems are also robust because there are a number of different the pavement: pollutants. Geotextile (i.e. Permafilter) pollutants, whilst the hydrophilic (water pollution removal mechanisms occurring within the pavement. comprises non-woven, needle punched attracting) elements simultaneously }} Pollution barriers These include, in order of significance: }} Filtration to remove silt or suspended solids (with associated pollutants) geotextile made from a proprietary blend facilitate water retention resulting in a long }} Permeable pavements 1. Filtration of sediment particles either by geotextiles of modified polyester fibres. The textile term stable biofilm, which subsequently }} Impervious pavements or by aggregate materials }} Biodegradation of hydrocarbons and other organic pollutants has a weight of 300g/m2. degrades the entrapped pollutants. }} Infiltration systems 2. Biodegradation of organic pollution such as oil }} Adsorption The entrapped pollutants are either removed }} Attenuation systems APPLICATIONS 3. Adsorption of pollutants onto aggregates }} Volatilisation or reduced to levels suitable for discharge The range of applications for the Geotextile into controlled waters. EXPERIMENTAL RESULTS 4. Settlement of sediment within the aggregate }} Precipitation (i.e. Permafilter) is virtually unlimited in traditional geotextile applications, where Geotextile (i.e. Permafilter) demonstrated The majority of pollution in rainfall run-off occurs in either frequently WORKING PRINCIPLE 2 enhanced hydrocarbon treatment can be retention of up to 6 litres of oil per 10m . occurring storms or in the first part of the flows from less frequent The proprietary blend of fibres in Geotextile achieved. Furthermore, it is applicable The effluent monitoring showed a maximum but more intense events (known as the first flush). It has been (i.e. Permafilter) exhibit specific hydrophilic in many ‘new’ applications where the discharge of 4.5ppm during the first flush recognised that if 90% of the average annual rainfall is captured and and hydrophobic properties and these, superior hydrocarbon retention is an and during consecutive rain events only an treated, then most pollution will be dealt with. This can easily be combined with the dimpled structure, indispensable requirement. average concentration of 1.5ppm. achieved by permeable pavements. work together to form multiple layers with inherent oil retention properties.

Water mixed with hydrocarbons Over time hydrocarbon Texture of Permafilter biodegrades

Oil is trapped in fabric Water passes through

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 30 SuDS SuDS 31 USE OF GEOTEXTILES PERMEABLE PAVEMENTS AND GEOMEMBRANES ON SLOPING SITES

Due consideration should be given to Geotextiles and OTHER USES If a pervious pavement is built on a sloping site, it must be designed to prevent all the water in the aggregates running to the bottom of the slope and Geomembranes. exiting the surface. The slope also reduces the available storage in the aggregates. A Geotextile (i.e. Permafilter) can also be used to protect against oil ingress below swales, infiltration basins and other similar GEOTEXTILES For sloping sites where the sub-grade gradient exceeds about 5%, terraced areas of permeable pavements that are separated below the surface by SuDS components where additional protection is required. Geotextiles are used to serve two purposes in a SuDS pavement: compartment walls, are particularly effective. Here, flow rates between compartments can be controlled, enabling optimal treatment of the water for maximum pollutant removal within the pavement. Terraces of interconnected permeable pavements can be used in isolation or with just a final SuDS }} The first is to prevent the migration of fine material between GEOMEMBRANES stage, such as a pond, to effectively treat run-off from paving and roofs. layers; for permeable paving this can mean that a geotextile is Geomembranes are impermeable liners used in Aggregate used at the base of the bedding layer in addition to the bottom There are three potential solutions to this issue: of the SuDS structure; generally with porous asphalt and porous Industries’ SuDS components to form water tight tanks. concrete a geotextile is only used at the base of the structure. The membrane used depends on a risk assessment of the }} Install check dams within the aggregates with flow controls to ensure the water does not flow to the lowest level and come out of the surface. site and the ground and groundwater conditions. There are various ways of achieving this, including bunds formed in concrete, membrane or blockwork. }} The second is to provide a layer to protect a waterproof membrane from damage caused by sharp aggregate The use of a polypropylene membrane that’s robust and resistant }} Terrace the site to give flat areas of permeable paving that have separated aggregates, storage areas. particles within either a sub-base or a sub-grade that to puncture is recommended. The membrane has welded joints can cut the membrane. and should be installed by a qualified sub contractor under a }} The SuperFlow aggregates thickness at the base of the slope can be increased to allow for the reduced storage capacity at the top of the slope. quality assurance scheme that includes testing of the joints. These precautions are required wherever the aggregate is used for water storage on sloping sites (including any infiltration systems). In all cases, UPPER GEOTEXTILE careful analysis and detailing is required to ensure that the water flows within the pavement are as predicted and that unexpected ‘spring lines’ The upper geotextile is used to prevent migration of the finer laying SuperDrainasphalt or Hydromedia do not occur in the pavement. The exact design will depend on the site area, discharge limits, etc. course material into the coarser sub-base material. SuperFlow SuDSAgg If the pavement area slopes towards a building then, as a precaution, a channel drain or surface channel should be provided to drain the water away Tests have shown that water quality will improve when it flows Lower Geotextile to a suitable outfall and prevent it ponding up against the building. (&/or Geomembrane) through a concrete block permeable pavement. There is evidence that the use of geotextile between the laying course and the Sub-grade sub-base may assist in enhancing pollution removal and biodegrading of pollutants.

The decision to use a geotextile between the laying course and Problem Water comes out at a low point the sub-base is a balance between durability and structural performance of the pavement and possible improvements in water quality. Reduced storage space available For non-woven geotextiles in contact with open graded aggregate, durability has been shown to increase as the weight of the textile InFilta Block Flow control to restrict flow increases. Geotextiles such as those specified by Aggregate between compartments optimises Industries are heavier weight materials (300g/m2) that are more SuperFlow JointAgg use of available storage space durable than thin lightweight materials. Solution 1 SuperFlow 6 In applications where there will be frequent trafficking by HGV’s, buses, etc., or the pavement is subjected to a large number of Upper Geotextile breaking and accelerating forces, the upper geotextile should Check dam SuperFlow 20 be omitted and the grading of the laying course and sub-base Flow control to restrict flow designed to avoid migration of materials. Lower Geotextile (&/or Geomembrane) between compartments optimises Solution 2 use of available storage space LOWER GEOTEXTILE Geotextiles are used in this location to act as a separator to prevent the sub-base punching into the sub-grade soils and causing Site surface terraced to accommodate storage clogging of the sub-base. Where water infiltrates to the ground, Check dam this geotextile will also act as a filter and support biodegradation. And where the geotextile is to be used to protect an impermeable Provide increased membrane, the use of a reinforced geotextile is recommended by Solution 3 storage space Aggregate Industries.

Sub-grade

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 32 SuDS CONSTRUCTION, INSTALLATION AND MAINTENANCE

Installation of Charcon Infilta 34 Installation of SuperDrainasphalt 35 Installation of Charcon Grassgrid 36 Installation of Hydromedia 37 Maintenance 38 34 SuDS SuDS 35 INSTALLATION OF INSTALLATION OF CHARCON INFILTA SUPERDRAINASPHALT

The laying of permeable paving should follow the guidance provided in the interpave manual and BS 7533 Part 3. SUPERDRAINASPHALT FORMATION SUB-BASE Aggregate Industries porous asphalt surfaces should be installed in accordance with the guidance provided in BS 594987 and the Specification for Highway Works. Any soft spots should be excavated first and back-filled with suitable The appropriate SuperFlow Aggregate sub-base should be laid in well compacted material. The subgrade, or original ground formation, 100-150mm layers and compacted to ensure that the maximum SuperDrainasphalt is normally paver laid but can also be hand laid for small areas. Coarse graded aggregate sub-base materials should be prepared by trimming to level and compacting, in density is achieved for the particular material type and grading, such as SuperFlow 20 do not provide a surface stable enough to bear the weight of the heavy equipment used in paver laid operations accordance with the ‘Specification for Highway Works’, to a tolerance without crushing the individual particles, or reducing the void content so, in these circumstances SuperFlow SuDSAgg is the preferred sub-base material. within +20mm to -30mm. If subgrade improvement is employed, below the design value. This is achieved with 4 passes of a smooth testing will be needed to demonstrate that the design CBR values wheeled roller, max. weight 1,000kg/m width without vibration. Care should be taken during construction of both the SuDS pavement and any adjacent works that the surface is not subjected and design infiltration rate have been consistently achieved. to any undue contamination or mechanical damage.

UPPER GEOTEXTILE It has no particularly special installation requirements but, similar to other open graded asphalt mixes, it will have a tendency to LOWER GEOTEXTILE A Geotextile should be laid on the SuperFlow Aggregate; chill more rapidly in cooler weather and care should be taken to ensure that the material is fully compacted across the whole width A Geotextile should be laid on the prepared formation; joints should joints should be overlapped by 300mm. of the mat to minimise the risk of joints opening up under traffic. be overlapped by 300mm.

TOLERANCE OF SURFACE LEVELS

Maximum permissible deviation from design level Surface regularity of the surface course

Normal block Infilta block Normal block Infilta block paving paving paving paving

Sub-base +5mm +20mm Pavement flatness 10mm under a 3m n/a -10mm -20mm straight edge

Roadbase +5mm +20mm Difference in level at the joint 2mm 2mm -10mm -20mm of adjacent paving units

Laying course +5mm +20mm -10mm -20mm

Surface course +6mm -6mm

BEDDING LAYER JOINTS A 50mm depth of SuperFlow 6 bedding aggregate should be laid Once the paving is laid they should be subjected to a first pass and loosely screeded to form the bedding layer for the Infilta Paving. with a vibrating plate compactor. It may be prudent to consider The accuracy of the final level of the bedding layer, +/- 20mm a neoprene sole plate to the plate compactor to avoid surface tolerance, is of particular importance as the aggregate will not damage to the paving. After the first pass with the vibrating plate, compact down to same the degree as a sand bedding layer would SuperFlow JointAgg should be brushed into the joints. when the block surface layer is vibrated. Once the joints have been filled any remaining loose material should be cleared from the surface and a further pass with the LAYING PAVING vibrating plate should be undertaken, joints to be inspected and topped up as necessary. The Infilta paving should be butted tightly together and laid in a suitable laying pattern to ensure maximum interlock / stability. If cutting is required the paving should be cut accurately to ensure a tight fit and should not be less than one third of the individual paver size.

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Grassgrid should be laid in a half bond pattern and it should be provided with an edge restraint. Where Grassgrid is used SITE PREPARATION CURING on slopes without any edge restraint, it should have staggered vertical joints with every second row staked with 500mm }} Clean off any remaining soil }} Once the concrete has been finished with the power-trowel, long wood or metal pins. cover the entire surface with a curing membrane, e.g. plastic }} Ensure soil bearing capacity of ≥ 50MPa sheet to protect the product from drying out. The plastic sheet The units should be infilled with 40/60 rootzone mix and an appropriate grass seed mix for the location. will be retained for seven days. If desired, you can water lightly }} Use of geotextile membrane between soil and sub-base always above the plastic, but it is not considered necessary GENERAL PRINCIPLES Aggregates }} Cables and pipes must be buried within sub-base }} The installation of the curing membrane must occur directly Installation design for Grassgrid system varies according If sub-grade is stable: }} To achieve a successful finish prepare pouring boxes; after finishing to prevent the evaporation of surface water from to the following factors: the product }} No aggregates required (for lighter loadings only) (see below) recommended compartments of 5m x 5m maximum to avoid cold joints }} Application type }} It is estimated that from the commencement of installation of If sub-grade is not stable: each bay to the installation of the curing membrane, it should }} Anticipated loadings (if trafficked) }} Material: granular aggregates Type 1 PLACEMENT not exceed 15 minutes }} Nature of existing sub-grade }} You can place directly or through auxiliary means (bucket, }} Compacted depth: for light traffic applications: 100mm minimum dump trucks), Hydromedia is not pumpable. Discharge time }} Degree of gradient (if relevant to application type) should never exceed the maximum time from batching as per }} For heavier traffic applications: 150mm minimum the delivery note - 90 minutes from loading APPLICATION TYPES }} Hydromedia workability verification. If during discharging, the }} Vehicular traffic including pedestrians, private cars, concrete has difficulty coming down the chute, the paste has light commercial vehicles (including light aircraft) no shine or you observe balls (loss of fluidity of paste), it will be considered that the delivery is not suitable for use }} Gradients including: cuttings/slopes, motorway embankments, spillways (for flood control works) }} For each layer, the thickness should not exceed 140mm and always maintain the top layer thickness greater than 80mm }} Water courses including: river bed reinforcement, restraining bank construction, existing bank stabilisation }} Install leaving the level 5mm above that required to allow for compaction LAYING DESIGN }} Do not place during rain The recommended laying design of Grassgrid units is influenced by the specific application type and circumstances: }} Do pour between 5°C & 30°C

Vehicular traffic COMPACTING AND FINISHING Half-bonded, preferably in a restrained area. }} Compact with a roller weighting 45kg per linear metre Edge restraints }} Perform this operation for a few minutes until you observe Edge restraints are recommended wherever possible, a clear compaction of the material especially for heavier loading applications. }} Ensure that the roller is slightly moistened to prevent aggregate Sub-grade sticking to its surface Stability of sub-grade needs to be assessed as this will affect aggregate requirement. }} After compaction, finishing is carried out with a power-trowel with pan attached and the surface is closed for a few minutes, until you observe the correct surface finish

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Generally speaking maintenance requirements for Aggregate Industries SuDS related products are quite minimal and intensive FOR INFILTA: SNOW AND ICE up-keep is not necessary. Infilta permeable paving is a low maintenance pavement system and Snow and ice should not prove harmful to the pavement material is tolerant of maintenance not being carried. and can be allowed to melt through in due course. If this is not The main cause of loss of permeability to the system is likely to be litter, excessive silt accumulation or physical/mechanical damage, so failure acceptable then de-icing salt may be applied but as with all asphalt to carry out some minimal and timely intervention to keep the upper surface free of debris, accumulated detritus and growths such as, moss and Periodically the surface should be visually inspected and dependent materials de-icing salt should preferably be applied before snow or weeds will have the effect of reducing the total drainage service life of the pavement surface. on observed build-up the detritus should be removed, in many ice is expected to develop. cases using a wide broom, shovel and non-metallic rake being With the exception of Grassgrid, which does not require any specific maintenance other than periodic visual inspection, the general principles standard practice. If snow has fallen it should be cleared before the application of the for maintaining the different systems are the same, however there are important, subtle differences in procedures for the different surfaces that salt by using hand shovels or wooden scrapers; use of mechanical, should be noted. Every six months the surface will benefit from a mechanical vacuum steel shovels should be avoided or used with care. Purpose build sweep (vacuum turned off). During cleaning inspect the grit in the snowploughs with rubber lips can be used with discretion. joints of the paving and where necessary ensure that the grit is filled FOR SUPERDRAINASPHALT & HYDROMEDIA: to surface level of the paving. Only proper De-Icing salt, produced in accordance with BS 3247 should be used and applied at a rate of between 25 & 40g/m². A wide soft broom can be used to sweep the surface but this has a If there is a minor oil spillage immediately flush the area through tendency to push smaller material into the surface. A rubber-tined with either plain water or water lightly diluted with a detergent. rake is usually better, although slow and arduous. Best of all is a This will get the oil through the asphalt layer thereby minimising any mechanical garden vacuum cleaner which will greatly speed up the possible softening of the asphalt. Once through the asphalt and into operation and do it more efficiently. Any equipment used should be the aggregate sub-base naturally occurring bacteria can digest the well maintained and carefully operated to avoid contamination of or oil safely. For more significant spills the sites “Spillage Response physical damage to the surface. Plan” should be adopted. With a significant oil spillage it is likely that the SuperDrainasphalt will be damaged and will probably require Periodically, dependent on observed build-up, the surface will replacement. In these circumstances the principal priority must be benefit from a vigorous wash using cold water pressure washers. to protect the environment. These, however, must be used with care. During cleaning great attention must be paid to ensuring that the process does not damage the surface by dislodging any stone chippings and that any SNOW AND ICE detritus is removed from the surface by sweeping before pressure Snow and ice should not prove harmful to the pavement material washing. This is to ensure that such detritus is not forced into the and can be allowed to melt through in due course. If this is not surface by the force of the pressure washer making it more difficult acceptable then de-icing salt may be applied but as with all asphalt to dislodge subsequently. materials de-icing salt should preferably be applied before snow or ice is expected to develop. NOTE: Steam cleaners should not be used. If the surface has become very badly sealed and does not If snow has fallen it should be cleared before the application of the respond satisfactorily to this treatment, suitable specialist salt by using hand shovels or wooden scrapers; use of mechanical, equipment such as mobile pressure water suction cleaner is steel shovels should be avoided or used with care, as it is likely required. This water-suction method has been demonstrated that such devices may snag on the increased texture of the to have the ability to remove accumulated surface detritus and SuperDrainasphalt with the likelihood that aggregate particles will be restore hydraulic performance without damaging the pervious plucked from the surface. Purpose build snowploughs with rubber system when used correctly. lips can be used with discretion.

The use of conventional brush sweepers (such as traditional Only proper De-Icing salt, produced in accordance with BS 3247 road sweeping equipment) and hand held high pressure water should be used and applied at a rate of between 25 & 40g/m². jet equipment is accepted if treated with extreme caution. The This specification requires the salt to be at least 92.5% soluble and sweepers must be used in vacuum mode only; use of the brushes to have a sizing range that means that the risk of any pore blocking must be avoided as they force detritus, such as sand and silt, into of the SuperDrainasphalt is minimal. If salt that does not comply the surface voids and reduce the effectiveness of the system, they with this standard is used there is a risk that it will be blended with can also dislodge aggregate particles from the surface. aggregate dust or sand, thus significantly increasing the risk of the High pressure washers at their highest setting will have a similar SuperDrainasphalt surface being blocked. effect and should therefore only be used at low pressure settings.

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Mount Vernon Hospital, Hillingdon 42 The Royal Oldham Hospital, Manchester 43 Reading School for Girls 44 Ikea, Spain 45 Barking Riverside, London 46 Enderby Park and Ride 47 42 SuDS SuDS 43 MOUNT VERNON HOSPITAL THE ROYAL OLDHAM HILLINGDON HOSPITAL MANCHESTER

CLIENT: Hillingdon NHS Trust CLIENT: Pennine Acute Hospitals NHS Trust

SECTOR: Healthcare SECTOR: Healthcare

CONTRACTOR: Jarvis Contracting CONTRACTOR: Bethell Construction

SUBCONTRACTOR: Toppesfield Ltd

ARCHITECT: Day & England, Stevenson Marsh Aggregate Industries has supplied an innovative drainage system for a new £1.8m, 13,000m2 car park at The Royal ENGINEER: Wilsham Consulting Oldham Hospital in Manchester – part of the Pennine Acute Hospitals NHS Trust.

}} Flood mitigation surfacing solution CUSTOMER TESTIMONIAL THE BACKGROUND “We worked with Aggregate Industries to fine tune the specification }} High quality material meeting specific requirements In 2014, Pennine Acute Hospitals NHS Trust, which runs The Royal so everyone was happy that the balance between cost and strength Oldham Hospital announced plans to create a new purpose built }} 4050m2 of porous SuperDrainasphalt car park had been achieved.” car park at Westwood Park for hospital staff. The car park would material supplied Stephen Gibson, Wilsham Consulting (www.wilsham.co.uk) provide 562 spaces located much closer to the hospital and would also feature improved security, including CCTV monitoring, a new }} SuperDrainasphalt supplied with Bardon Hill aggregates controlled pedestrian entrance allowing access for staff 24 hours a at a PSV of 60 day and improved lighting.

}} Asphalt mixed and delivered at between 160 and 180°C Manchester based national contractor, Bethell Construction, were successful in securing the £1.8m contract following a competitive THE BACKGROUND tender process and they were employed on a ‘design and construct’ basis to develop the initial planning design for not just the Completed in 2009, SuperDrainasphalt surfacing solutions helped new car park, but also footpaths, external works and an adoptable to prevent flood risk at the £13m Mount Vernon Hospital project. access road.

THE PROBLEM THE PROBLEM Extensive flooding was occurring prior to works downstream of As the site was within close proximity to the hospital, noise, dust Mount Vernon Hospital. So, the project in hand needed to reduce and traffic movements needed careful consideration. The options both total and peak flows. A multi-stage sustainable water treatment for the surface water design were compounded by the fact that the system was proposed, combining a number of techniques such as local statutory water company, United Utilities, had specified a 5l/s porous asphalt, swales, French drains and attenuation basins. flow rate for the outfall of surface water from the 13,000m2 car park into the public sewer. An essential component for the successful THE SOLUTION delivery of this complex project was finding the right materials The site’s main boulevard for the hospital and terminal for the supplier to work with to produce a workable solution for the car London Bus Company were combined with SMA, as well as porous park drainage. The ability to deliver both technical advice and an asphalt for the large car park. The final pavement solution was innovative solution was key. specified as 35mm of 10mm SuperDrainasphalt laid on 80mm of 20mm Open Binder. The solution allowed for the effective drainage THE SOLUTION of surface water at source and was also suitable for worse case storm water scenarios. Aggregate Industries recommended an innovative system using Aggregate Industries’ technical team worked alongside SuperDrainasphalt, a permeable asphalt that allows water to pass Manchester-based national contractor, Bethell Construction to Hillingdon NHS Managers were pleased with the project, having freely through the underlying structure, specifically developed for install the system which comprised a 100mm layer of 63-10mm provided a leading example of sustainable low impact civil use as an asphalt porous surface and binder course component in aggregate over an impervious membrane, with a 50mm layer of design in the UK. When commenting on the performance of the a Sustainable Drainage System (SuDS) pavement. This material also Type-3 sub-base on top. Water would drain into an attenuation SuperDrainasphalt used, Hillingdon NHS said, “I don’t know why reduces surface water spray and headlight glare in wet weather, and tank with an underground soakaway, while a drainage channel this is not done everywhere”. A huge benefit of using porous its inverted texture allows for high capacity acoustic absorption. running along the middle of the car park was also incorporated into asphalt for the Trust was that it essentially eliminated ponding the design. Finally, the surface of the car park was laid in layers of and therefore slipping hazards around cars. asphalt approximately 90mm of 20mm SuperDrainasphalt Binder Course and 40mm of 10mm SuperDrainasphalt Surface Course.

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 44 SuDS SuDS 45 READING SCHOOL IKEA STORE FOR GIRLS MADRID

CLIENT: Education Funding Agency CLIENT: Ikea, Spain

SECTOR: Education SECTOR: Retail

CONTRACTOR: Interserve Kajima

SUBCONTRACTOR: WH Willis & Sons Ltd

}} Surface flooding solution }} Achieve optimal flatness and uniform thickness for the comfort to high-performance design and quality. That’s why they turned to of IKEA customers trying to navigate a busy parking lot while LafargeHolcim for a bespoke concrete solution that could be easily }} 2500tn of SuperFlow SuDSAgg supplied for main car park pushing carts loaded with bulky items. installed to a tight project schedule and deliver against a challenging specification that looked at whole life performance with a need }} 4050m2 of porous SuperDrainasphalt car park }} Guarantee maximum drainage capacity (400 litres per square minimize subsequent maintenance of the future complex. material supplied metre per minute) to avoid rainwater accumulation.

}} 400tn of SuperFlow 6 supplied for block paved }} Resists heavy foot and vehicular traffic whilst being a material THE PROBLEM pedestrian walkways with a high void content. Constructing a new IKEA store requires a few more tools and considerably more expertise than assembling one of the brand’s }} Meets IKEA’s exacting, high aesthetic standards which go above THE BACKGROUND intuitively-designed bookshelves or bedside tables. Our teams and beyond what might be expected of a car park. collaborated closely with IKEA in Spain to identify their needs, Working on behalf of principal contractor Interserve Projects, understand their unique brand experience and brainstorm solutions. AH Willis & Sons delivered a new pervious 124 space car park as }} Easily installed with preparation and placement completed part of the £26m redevelopment of Reading Girls School. in less than 30 days. The store’s 10,000m2 car park quickly emerged as a key aspect of the project that could benefit from our products and technical expertise. }} While asphalt is normally the obvious material choice for most THE PROBLEM Together with the client, we established a set of construction criteria car parks, it fails to deliver on several of IKEA’s key requirements. and we were confident we had a product that would deliver on all Historically, the site suffered from poor surface water run-off leading In order to meet every one of the customer’s expectations, aspects of the challenging criteria. to surface water flooding. So, under guidance from the Environment we knew we couldn’t simply propose an “off the shelf” solution. Agency, the contractor adopted the Sustainable Drainage System principles into its car park design. THE SOLUTION THE BACKGROUND Thanks to its very high permeability and drainage capacity, When IKEA was constructing a new retail store outside of THE SOLUTION Hydromedia™ concrete absorbs rainwater and facilitates its natural Madrid, the customer experience was at the heart of the design, runoff into the ground. Designed for urban environments, using Aggregate Industries was selected as the supplier of choice for right down to the car park. Since the Swedish furniture company Hydromedia™ means less flooding and safer roads, pathways the permeable aggregates and porous asphalt requirements. wanted a best-in-class surface that would be perfectly flat, puddle and car parks. Its cutting-edge formula also delivers high durability This was due to the high performing SuperDrainasphalt, which free and ultra-resistant, they knew to call upon the expertise of and robustness against the daily impact of high levels of offered the desired level of flow for surface water run-off. another world leader, LafargeHolcim, to find the perfect solution. pedestrian and vehicular traffic. The SuperFlow SuDSAgg, that works as a sub-level reservoir, Our HydromediaTM draining concrete for water management provided the optimal level of water retention within the sub-base delivered on all counts of this challenging project that took more construction underneath, resulting in far greater rain than an illustrated user manual to pull off. water management. Key project figures: 10,000m2 car park surface To assist with the overall SuDS design, SuperFlow 6 was chosen thanks to its low fines and free flowing angular characteristics. It was 1620m3 used as a block paving laying coarse aggregate on the pedestrian Hydromedia™ speciality concrete walkways to offer further control of surface water run-off within these particular areas. 22 Days Delivery and technical assistance

IKEA and LafargeHolcim: A beautifully designed partnership As the world’s largest furniture retailer with 328 stores in 28 countries, IKEA is synonymous with functional design and quality. So when it looked to optimise the construction of its newest store in the suburbs of Madrid, IKEA needed a partner equally committed

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 46 SuDS SuDS 47 BARKING RIVERSIDE ENDERBY LONDON PARK AND RIDE

CLIENT: Barking Riverside LTD, Bellway Homes CLIENT: Leicester City Council and Leicestershire County Council

CONTRACTOR: PJ Carey SECTOR: Car Park

SUBCONTRACTOR: Mae with O’Keefe ENGINEER: Clear Environmental Consultants Ltd

SECTOR: Housing GROUNDWORKER: Fitzgerald Civil Engineering Contractors Ltd

ARCHITECTS: LB Barking and Dagenham, Southern housing group and the London Gateway Thames corporation, Allen Pyke, Brown Boon, Sheppard Robson

GROUNDWORKER: DF Cark Bionomique

}} Built on the former Barking power station THE BACKGROUND The Enderby Park and Ride scheme was planned to help cut }} 40% of the development designed on green space congestion on city and county roads, having a positive impact on }} Sustainable living at the heart of the project the reduction of noise and pollution. The facility significantly reduces the traffic volume from Junction 21 of the M1 and provides an alternative mode of transport to the city centre whilst contributing THE BACKGROUND to the regeneration of Leicester. At 185 hectares, Barking Riverside is one of the largest development sites in London. It is also one of the most ambitious and important THE SOLUTION developments in the UK. The vision was to provide a model for sustainable living in the 21st Century where best The main innovation on this scheme is the scale of the Sustainable practice is used throughout. Drainage System (SuDS) installed in the parking area. Rainwater is drained, treated for pollutants and attenuated in storage tanks that feed water run-off into balancing ponds to prevent flooding THE PROBLEM and create new opportunities for wildlife habitats. Barking Riverside has been built on the former Barking Power Station site. So, making it developable has required land With poor ground conditions and a high water table, Aggregate remediation, site clearance and changes to land levels to plan Industries, along with their engineering design consultants, helped for flood risk. identify the potential flooding issues as a result of the 6 hectare development. A shallow excavation solution was developed using THE SOLUTION a hybrid of Permavoid crates and aggregate sub-base attenuation systems. This allowed the cost to be kept to a minimum but meant With 40% of the development designed as green space, that the attenuation levels were still sufficient. Aggregate Industries’ Charcon Infilta block paving provided a permeable surface to the hard landscaped areas, allowing water We also supplied permeable paving to tackle surface water run-off filtration through the paving and mitigating flood risk across the site. from source as well as a non-permeable highly aesthetic Andover Textured block paving for the areas around the terminus building. With sustainable living at the heart of this project, our Infilta Special painted blocks were also used to mark parking and block paving helped tackle the necessary drainage requirements. disabled bays. And our natural stone replica paving, StoneMaster, provided a wonderful landscape setting with up to 57% non-primary materials The flagship scheme has scooped a prestigious eco award at the within its mix. regional Constructing Excellence Awards and coveted sustainability category in the CIHT Awards. Furthermore, Andover Washed, characterised by it’s pale, understated colour, was also provided to enhance the contemporary backdrop of the project. This product also has a minimum of 53% recycled or reclaimed material.

To finish the site off, Eco Countryside Kerb, with it’s exceptional environmental credentials, maximised the use of renewable materials on site and optimised resource productivity.

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Appendix 1 - Technical Specifications 50 Appendix 2 - Guidance and Legislation 61 Appendix 3 - The Complete Service 62 50 SuDS SuDS 51 APPENDIX 1 TECHNICAL SPECIFICATIONS

HYDROMEDIA® GRASSGRID

FAST DRAINING ENGINEERED CONCRETE BLOCK PAVING OHS 61759 FM 96927 EMS 96928

Hydromedia is an ideal solution for surface and stormwater management. A fast draining concrete pavement solution that rapidly An interlocking cavity grid system, grassgrid offers natural looking hard standing for vehicles and strengthening of embankments. directs stormwater off streets, parking surfaces, driveways and walkways. Minimises costs and long-term maintenance for local authorities and developers of stormwater management. A range of strengths is available. Unique in-built pyramid shapes provide unsurpassed strength PERFORMANCE WITH SLIP RESISTANCE

Designed with a sub-base to contain typically 15 - 35% voids, water flows freely through Hydromedia at rates in excess of Ideal for strengthening of embankments and water courses Not applicable. 150 - 1000 litres/minute/m2. Suitable for use in permeable installations where specifications COMPLEMENTARY PRODUCTS marry hard and soft landscaping PRODUCT RANGE KEY BENEFITS All Aggregate Industries hard landscaping ranges, especially Uses 55% recycled and reclaimed aggregates There are four prime versions of Hydromedia as below: Stormwater management - high permeability and drainage capacity Andover Textured and Europa. Excellent sustainability credentials. Hydromedia pedestrian – No traffic applications Environmental management - minimises urban impact on natural water cycle Hydromedia car park – Very light traffic conditions APPLICATIONS Reduces costs as part of a SuDS (Sustainable Drainage System) Hydromedia underlayer – Non traffic Grassgrid block paving is suitable for strengthening of embankments, Available with integral colour to offer decorative and functional all roadside verges, overspill car parks, recreational areas and Hydromedia underlayer – Light traffic. hard landscaping opportunities emergency vehicle access roads. Refer to our technical department A range of strengths is available. Please speak to our technical Eliminates the needs for retention ponds for further guidance on suitability for given applications. specialists to ascertain which grade suits your project. Offers potential space saving for efficient land development MANUFACTURING STANDARD APPLICATIONS Mitigates surface pollutants Grassgrid block paving is manufactured using a semi-dry process Residential roads Reduces glare from wet pavement and is manufactured in accordance with and complies with all relevant sections of BS EN 1338: Precast Concrete Block Paving – requirements Car parks (light traffic - maximum load 3.5mt) and parking areas No standing water, lessens risk of hydroplaning. and test methods. Leisure (e.g Tennis courts, swimming pool decks, cycleways) Aggregate Industries fully operates an accredited Quality Assurance CHARACTERISTICS Driveways and alleyways scheme, certified to BS EN 9001:2008 which is independently and 2 Compressive strength ~10-15N/mm regularly assessed by BSI (British Standards Institution). Pavement edge drains and gutters Voidage from 15-35% depending on type and placing technique All Aggregate Industries manufacturing sites are also certified to Can be used as a structural underlayer. Unit weight is typically 70% of conventional concrete BS EN 14001 Environmental Management Systems.

Workable up to 90 minutes

Flexural strength of 1.5 - 3N/mm2. PRODUCT DATA TECHNICAL SUPPORT Size (mm) 366x274 Aggregate Industries Technical Services will provide advice, support and assistance in all aspects of the selection and Thickness (mm) 100 use of Hydromedia concretes. Weight (kg) 15.8 Units/m2 (approx) 10 No. per pack 48 M2/pack (approx) 4.80 Pack weight (T) 0.76 Colours Grey Q24. For NBS clauses, refer to Aggregate Industries technical services. For further information, to place an order or to speak to one of our Hydromedia specialists, please contact the following sales offices: Chamfered N/A † Represents non-primary material within the complete mix design. Scotland - 01698 870947 North - 01283 712677 Midlands and South East - 01283 712677 South West - 01752 485201

Technical Information: www.aggregate.com/grassgrid 52 SuDS SuDS 53

LYTAG INFILTA LIGHTWEIGHT SUSTAINABLE

PERMEABLE PAVING OHS 61759 FM 96927 EMS 96928 DRAINAGE SYSTEMS OHS 61759 FM 96927 EMS 96928

A range of aesthetically pleasing permeable paving products used to form a hard wearing concrete block paving product. Each The unique properties of Lytag® products allow them to be used in a variety of drainage applications. It is a rounded, manufactured interlocking unit incorporates a specially designed discreet 5mm spacer nib to allow the ingress aggregate that does not degrade over time. Placing on site is relatively easy as the material “flows” into voids and needs little of surface water through to the sub-base water storage system below. additional compaction, saving time and money.

FEATURES PRODUCTS AND APPLICATIONS Non-Compactable – Unlike irregular shaped aggregate, which over time ® }} Permeable surfacing and source control SuDS technique Land Drainage - Hortag® horticultural media is ideal for smaller land often compact and silt up, Lytag products’ rounded shape maximises drainage projects. Its rounded shape and regular grading give excellent the proportions of voids necessary for efficient drainage and aeration. }} Colour mix and texture options to provide high quality, hydraulic conductivity. It is used to construct golf course greens and is Even after many years of service underground the compaction is minimal aesthetic and functional schemes used in slit trenching and gravel banding, including Shelton Systems. so free flowing properties are maintained. }} Can be easily lifted for access to services and reinstated Sports Fields - Hortag® is excellent for both open trenching and for turf High Absorption – Rapid dispersion of water is improved by both high without leaving the usual repair scars slitting. 6/14mm aggregate can also be used for trench fill around absorption characteristics and non-compatibility (A soak away system ® }} Offers high levels of durability and good grip. bowling greens. using Lytag products can retain as much as one third of its weight in water). Due to its non-compactability it offers a much improved rate ® Geofill civil engineering bulk fill may be used for bulk fill purposes, where of hydraulic conductivity when compared to natural aggregates. APPLICATIONS efficient drainage is important, in contracts using the Specification for Charcon Infilta is suitable for use in a range of applications including Highway Works or is to be used as a granular bedding and sidefill for Easy on machinery – Damage to machinery can be reduced due to pedestrian areas, shopping precincts, access roads and car rigid and flexible pipes. BS EN 1610 – Construction and testing of drains the rounded shape, weight, and impact reduction and non-abrasive parking facilities. Refer to technical services for advice on specific and sewers details the design requirements. qualities of the pellet. applications Tel: 01335 372222. ® Green Roof and Architectural Landscaping - When mixed with soil, Manual Handling – Due to the weight of Lytag products being Hortag® makes an excellent lightweight growing medium. Careful approximately half that of natural aggregate, handling is less arduous MANUFACTURING STANDARD consideration has to be given to the component parts of the system to and the risk of physical injury is reduced. Infilta permeable paving is compliant to European Standard ensure they provide a suitable medium for sustaining vegetation, provide TECHNICAL SUPPORT BS EN 1338 and BS EN 1339. adequate drainage while still retaining moisture, minimise the weight on Further details on specific properties are given in the appropriate section the building and should aim to protect the environment but, at the same All Aggregate Industries products are manufactured in accordance of the Lytag® Technical manual, which can be found on www.lytag.com time minimise the use of finite natural resources and provide reasonable with ISO 9001 with factory compliance to ISO 14001. value to those involved in its design, construction and operation.

PERFORMANCE WITH SLIP RESISTANCE KEY BENEFITS Quality – Effective Quality Management Systems ensure consistent Strength: The products are manufactured to meet the strength product manufacture. requirements of BS EN 1338 and BS EN 1339. Stability – They will not degrade, clog or impede drainage. It will aid Slip and skid resistance: Concrete block permeable paving has long life and high performance to any scheme. satisfactory slip/skid resistance in accordance with manufacturing standard BS EN 1338 and BS EN 1339. Cost Saving – It is half the weight of natural stone or gravel thus savings are made in transportation and laying costs – a 30 tonne tipper COMPLEMENTARY PRODUCTS truck can collect 36.5m3 of Lytag® products compared with only 18m3 of natural aggregate. Superflow Aggregates Ease of placing – Being a rounded aggregate, Lytag® products SuperDrainasphalt “flow” easily and quickly into position, reducing any need for specialist Kerbs placing techniques.

Edgings Use in Soft Ground – In wet and difficult ground conditions, they can be used when it would be difficult or impossible to Paving transport heavier natural aggregate.

Pellet Shape – Due to the rounded shape of the pellet, no damage is caused to plastic pipes, membranes or bags.

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™ ® SUPERDRAINASPHALT OHS 61759 FM 96927 EMS 96928 SUPERSPORT OHS 61759 FM 96927 EMS 96928

A porous asphalt which allows water to pass through to the underlying structure. The product comes in various sizes to suit SuperSport is a range of asphalt products designed to meet job specific requirements and offer a range of benefits for tennis a range of applications and can be combined with our wide range of other sustainable drainage products to offer the perfect courts and Multi Use Games Areas (MUGAS). A selection of binders are used, these include normal penetration grades, Sustainable Drainage Systems (SuDS) solution. Designed to reduce the potential impact of surface water drainage in new polymer modified grades and our ‘Plus’ binder, to provide job specific requirements and benefits. SuperSport can also be and existing developments. produced as a red product.

FEATURES SUPERSPORT RANGE }} Porous material allows surface water to drain SuperSport Tennis: SuperSport Tennis is a fast draining material that is designed to meet the stringent demands of this sport. It is fully }} Developed for use as a porous asphalt surface and binder compliant with the requirements of the Lawn Tennis Association course component in a SuDS pavement and SAPCA. }} Durability maximised by careful mix design and use of SuperSport MUGA: SuperSport MUGA is the ideal product for a carefully selected polymer modified binder. Multi Use Games Areas where a variety of activities including basketball, hockey, football and netball* are played. It is fully compliant APPLICATIONS with the requirements of SAPCA. }} Commercial schemes SuperSport binder course: SuperSport binder course materials are }} New housing developments available in 10, 14 and 20mm aggregate sizes, enabling the contractor to select the material best suited to their application. These are the }} Retails parks recommended binder course materials for our SuperSport surface }} Car parks course options.

LAYER APPLICATIONS Base, binder and surface courses }} Tennis courts }} Multi-use games areas KEY PERFORMANCE PROPERTIES (TYPICAL PROPERTIES) }} School playgrounds

KEY PERFORMANCE PROPERTIES PROPERTY UNITS 32MM 20MM 14MM 10MM 6MM (TYPICAL PROPERTIES) SUPERDRAIN SUPERDRAIN SUPERDRAIN SUPERDRAIN SUPERDRAIN ASPHALT ASPHALT ASPHALT ASPHALT ASPHALT PROPERTY UNITS 20MM 14MM 10MM 6MM 6MM Void Content % >18 >18 >18 NA NA SUPERSPORT SUPERSPORT SUPERSPORT SUPERSPORT SUPERSPORT MUGA TENNIS

Water Infiltration mm/hr >15,000 >15,000 >12,000 >12,000 >5,000 Rate Void Content % >18 >18 NA NA NA

(Tested in accordance with -3 -3 -3 -3 -3 EN 12616:2013, Method A) m/s >4.1 x 10 >4.1 x 10 >3.3 x 10 >3.3 x 10 >1.4 x 10 Water Infiltration mm/hr >15,000 >15,000 >12,000 >5,000 >5,000 Nominal Layer Rate mm 70-120 60-90 40-80 30-50 25-35 Thickness (Tested in accordance with -3 -3 -3 -3 -3 EN 12616:2013, Method A) m/s >4.1 x 10 >4.1 x 10 >3.3 x 10 >1.4 x 10 >1.4 x 10 Nominal Layer mm 60-90 40-80 30-50 25-35 25-35 Thickness

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 56 SuDS SuDS 57

SUPERFLOW 6 SUPERFLOW 20

AGGREGATE TYPE: 2/6 Crushed angular rock ASSOCIATED PRODUCTS & SOLUTIONS: AGGREGATE TYPE: 4/20 Crushed angular rock ASSOCIATED PRODUCTS & SOLUTIONS: SOLUTION: Permeable Block Paving }} Charcon Commercial Landscaping: Infilta™ product SOLUTION: Permeable block paving, hand laid porous asphalt }} Charcon Commercial Landscaping: Infilta™ product range offering high quality permeable paving blocks and porous concrete range offering high quality permeable paving blocks APPLICATION: Laying course / bedding aggregate to suit all applications. to suit all applications APPLICATION: Upper reservoir layer / free draining sub-base Aggregate Industries SuperFlow 6 is a high performance laying }} SuperDrainasphalt™: A porous asphalt solution which course aggregate specifically designed to provide controlled water Aggregate Industries SuperFlow 20 is a high performance open offers an alternative to block paving systems management within Sustainable Drainage Systems (SuDS). graded aggregate specifically designed to provide controlled water management within Sustainable Drainage Systems (SuDS) }} Hydromedia® Concrete: A fast draining concrete SuperFlow 6 provides a stable, flat laying surface, while retaining the pavement solution which rapidly directs stormwater optimal level of voids for consistent water flow. This carefully graded SuperFlow 20 is a key component within the SuDS foundation off surfaces to the SuDS application beneath. aggregate, with it’s natural strength and interlocking properties, design and forms an upper reservoir drainage layer offering ensures both the integrity of the pavement and the excellent controlled storage and flow of the rain water within the system. drainage characteristics are maintained throughout. SuperFlow 20’s specific grading, natural strength and interlocking properties ensures both the integrity of the pavement and FEATURES & BENEFITS: excellent drainage characteristics are maintained throughout. }} Super Sustainable: Working with the environment to prevent flooding and water pollution FEATURES & BENEFITS: }} Super Sustainable: Working with the environment to prevent }} Super Production: Expert production techniques ensuring flooding and water pollution the highest levels of quality and consistency. }} Super Production: Expert production techniques ensuring }} Super Performance: Crushed angular stone offering long term the highest levels of quality and consistency. durability and optimal void retention for controlled flow of water }} Super Performance: Crushed angular stone offering long term }} Super Support: Dedicated technical and specification teams durability and optimal void retention for controlled flow of water to assist with your SuDS design. }} Super Support: Dedicated technical and specification teams to assist with your SuDS design.

KEY PEFORMANCE CRITERIA KEY PEFORMANCE CRITERIA

PROPERTY STANDARD PROPERTY STANDARD CATEGORY UNIT VALUES

Resistance to fragmentation BS EN 1097-2 Fines content BS EN 933-1 f % ≤ 4

Compacted Voids Air Voids N/A % 30 Resistance to wear BS EN 1097-1 ≥

Flakiness Index BS EN 933-3 Fl % ≤ 20 Acid Soluble Sulphate (AS0.2) BS EN 1774-1

Resistance to fragmentation BS EN 1097-2 LA % ≤ 30 Magnesium Sulfate Soundness BS EN 1367-2 Resistance to wear BS EN 1097-1 MDE % ≤ 20

SuperFlow 6 complies with the requirements of BS7533-13 & the CIRIA document (C753) Acid Soluble Sulphate (AS0.2) BS EN 1774-1 (AS) % ≤ 0.2

Magnesium Sulfate Soundness BS EN 1367-2 MS % ≤ 18

Coefficient of permeability, k m/s ≥ 6 X 10 -2

Horizontal Permeability HA41/17 Coefficient of permeability, k m/h ≥ 216

Coefficient of permeability, k mm/h ≥ 216,000

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SUPERFLOW 63 SUPERFLOW SUDSAGG

AGGREGATE TYPE: No fines crushed angular rock ASSOCIATED PRODUCTS & SOLUTIONS: AGGREGATE TYPE: 0/40mm Crushed angular rock }} Super Performance: Crushed angular shape and natural durability allows optimal compaction, void retention and SOLUTION: Permeable Block Paving }} Charcon Commercial Landscaping: Infilta™ product SOLUTION: Permeable block paving, porous concrete long term performance range offering high quality permeable paving blocks & porous asphalt APPLICATION: Lower reservoir layer / free draining sub-base to suit all applications or capping APPLICATION: Free draining sub-base / reservoir layer }} Super Support: Dedicated technical and specification team to assist with your SuDS design. }} SuperDrainasphalt™: A porous asphalt solution which Aggregate Industries SuperFlow 63 is a high performance coarse offers an alternative to block paving systems Aggregate Industries SuperFlow SuDSAgg is a high performance aggregate specifically designed to provide controlled water sub-base aggregate specifically designed to provide controlled ASSOCIATED PRODUCTS & SOLUTIONS: }} Hydromedia® Concrete: A fast draining concrete pavement management within Sustainable Drainage Systems (SuDS). water management within Sustainable Drainage Systems (SuDS). }} Charcon Commercial Landscaping: Infilta™ product range solution which rapidly directs stormwater off surfaces offering high quality permeable paving blocks to suit all SuperFlow 63 is a robust, no fines aggregate typically used where to the SuDS application beneath. SuperFlow SuDSAgg is a well graded, reduced fines, crushed applications the ground conditions are soft or where deep level make up is aggregate with a maximum nominal size of 40mm. This product has required where it forms a stable starter layer within the pavement been designed with a void content of 30% or greater to ensure the }} SuperDrainasphalt™: A porous asphalt solution which offers construction. SuperFlow 63’s large angular shape offers optimal optimal flow of water is achieved upon compaction. The excellent an alternative to block paving systems voids for controlled flow of rain water, while it’s natural strength water management characteristics of SuperFlow SuDSAgg ensures ensures the long term integrity of the pavement is maintained. a harmonious compatibility with the permeable asphalt or concrete }} Hydromedia® Concrete: A fast draining concrete pavement surface being adopted within the pavement design. solution which rapidly directs stormwater off surfaces to the SuDS application beneath FEATURES & BENEFITS: SuperFlow SuDSAgg is designed to meet the structural }} Super Sustainable: Working with the environment to prevent requirements of a Foundation Class 2 material as defined in the }} SuperSport: A porous asphalt designed for use in sports flooding and water pollution Design Manual for Roads & Bridges. The products structural surfacing applications. stability means it can be used independently or as a stabilisation }} Super Production: Expert production techniques ensuring the layer over Aggregate Industries SuperFlow 20 when used under highest levels of quality and consistency paver laid SuperDrainasphalt. }} Super Performance: Crushed angular stone offering long term durability and optimal void retention for controlled flow of water FEATURES & BENEFITS: }} Super Sustainable: Works with the environment to prevent }} Super Support: Dedicated technical and specification teams flooding and water pollution to assist with your SuDS design. }} Super Production: Expert production techniques ensuring the highest levels of quality and consistency

KEY PEFORMANCE CRITERIA KEY PEFORMANCE CRITERIA

PROPERTY STANDARD CATEGORY UNIT VALUES PROPERTY STANDARD CATEGORY UNIT VALUES

Fines content BS EN 933-1 f % ≤ 4 Fines content BS EN 933-1 f % ≤ 4

Compacted Voids Air Voids N/A % ≥ 30 Compacted Voids Air Voids N/A % ≥ 30

Flakiness Index BS EN 933-3 Fl % ≤ 20 Flakiness Index BS EN 933-3 Fl % ≤ 20

Resistance to fragmentation BS EN 1097-2 LA % ≤ 30 Resistance to fragmentation BS EN 1097-2 LA % ≤ 30

Resistance to wear BS EN 1097-1 MDE % ≤ 20 Resistance to wear BS EN 1097-1 MDE % ≤ 20

Acid Soluble Sulphate (AS0.2) BS EN 1774-1 (AS) % ≤ 0.2 Acid Soluble Sulphate (AS0.2) BS EN 1774-1 (AS) % ≤ 0.2

Magnesium Sulfate Soundness BS EN 1367-2 MS % ≤ 18 Magnesium Sulfate Soundness BS EN 1367-2 MS % ≤ 18

Coefficient of permeability, k m/s ≥ 6 X 10 -2 Coefficient of permeability, k m/s ≥ 6 X 10 -2

Horizontal Permeability HA41/17 Coefficient of permeability, k m/h ≥ 216 Horizontal Permeability HA41/17 Coefficient of permeability, k m/h ≥ 216

Coefficient of permeability, k mm/h ≥ 216,000 Coefficient of permeability, k mm/h ≥ 216,000

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AGGREGATE TYPE: Washed crushed rock grit ASSOCIATED PRODUCTS & SOLUTIONS: }} Charcon Commercial Landscaping: Infilta™ product GUIDANCE AND SOLUTION: Permeable Block Paving range offering high quality permeable paving blocks APPLICATION: Brushing into permeable block joints to suit all applications.

Aggregate Industries SuperFlow JointAgg is a high performance LEGISLATION finishing aggregate specifically designed for brushing into block pavement joints. This aesthetically pleasing product offers excellent free draining characteristics due to its low fines content, while it’s Aggregate Industries works in accordance with guidance and legislation. This brochure is produced natural strength ensures the long term integrity of the SuDS system inline with up to date information at the time of production (2018). is maintained for a refined, yet functional pavement finish. Please note that Aggregate Industries does not maintain Professional Indemnity Insurance for any pavement FEATURES & BENEFITS: advice that it provides, therefore the content in this brochure is provided in good faith for information only, it is not intended to amount to advice upon which you should solely rely. }} Super Sustainable: Works with the environment to prevent flooding and water pollution You must obtain additional professional or specialist advice before taking, or refraining from taking, any action on the basis of the content of this brochure. }} Super Production: Expert production techniques ensuring the highest levels of quality and consistency The documents below are the principle planning, legislative and design guidance for Sustainable Drainage Solutions:

}} Super Performance: Crushed angular shape and natural }} Planning Policy Statement PPS 25 strength allows optimal void retention and long term durability }} The Building Regulations Super Support: Dedicated technical and specification team }} }} CIRIA Report C753 to assist with your SuDS design. }} Pollution Prevention Guideline No.3 }} Department of Transport }} Interpave, Guide to the Design Construction and Maintenance Pavements.

KEY PEFORMANCE CRITERIA For up to date, relevant documents, please refer to www.susdrain.org. Created by CIRIA, it is the independent and authoritative platform for those involved in delivering sustainable drainage. PROPERTY STANDARD

Resistance to fragmentation BS EN 1097-2

Resistance to wear BS EN 1097-1

Acid Soluble Sulphate (AS0.2) BS EN 1774-1

Magnesium Sulfate Soundness BS EN 1367-2

SuperFlow JointAgg complies with the requirements of BS7533-13 and the CIRIA document (C753)

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] 62 SuDS SuDS 63

APPENDIX 3 AGGREGATE INDUSTRIES NOTES THE COMPLETE SERVICE

The Aggregate Industries group offers an extensive range of products and services to the construction industry.

AGGREGATES CONTRACTING Our aggregates team supply an extensive range Our contracting team provides a range of of high quality aggregates including crushed construction solutions and related products for rock, sand and gravel, stone and fill materials the highways and civil engineering sectors. for various construction applications. Whether Services include highway surfacing mobile by road, rail, river or sea, through our network material production and composite pavements. of quarries across the UK and Northern Europe, We have over 70 years’ experience in providing we can supply the most sustainable methods of the highest quality highway construction and civil delivering aggregate orders of any size. engineering solutions for a wide range of clients. T: 01455 285200 T: 01455 265600 E: [email protected] E: [email protected]

ASPHALT CONSTRUCTION SOLUTIONS We are a major supplier of asphalt and Charcon Construction Solutions offer a faster, bituminous products in the UK. Our clients and smarter and stronger approach to integrated customers include the majority of the UK’s building by providing innovative offsite highways contractors, as well as working with manufactured components and precast clients such as Highways Agency and major products for most stages of construction. developers on projects. T: 01249 463244 T: 0844 557 8396 E: [email protected] E: [email protected]

COMMERCIAL LANDSCAPING GARDEN LANDSCAPING Our award-winning Charcon range of hard We provide products for a variety of projects, from landscaping products offers the industry paving and block paving to walling and edging. complete commercial solutions for all types of We also have an extensive range of materials project, including urban, residential, traditional available for different aesthetic requirements, and contemporary environments. including porcelain, concrete and natural stone. T: 01335 372222 T: 01335 372222 E: [email protected] E: [email protected]

CEMENTITIOUS MATERIALS OVERSEAS Lafarge Cement offers a wide variety of bulk and Aggregate Industries Overseas supplies high packed cementitious materials, produced at our quality aggregates to Europe from bases in the cement plants in Cauldon, Staffordshire and UK, Poland, Germany, Norway and Latvia. Cookstown, County Tyrone. T: 01530 512025 T: 01455 288392 E: [email protected] Sales: [email protected] Technical: [email protected] W: lafargecement.co.uk

CONCRETE We are one of the leading ready-mixed concrete producers in the UK, supplying a full range of quality concrete products to satisfy the needs of the construction industry. We operate from over 70 sites, and have local plants across the UK. Many of our sites operate our Minimix service, which provides small loads of quality assured concrete. T: 03332 200 881 E: [email protected]

For any queries on the Aggregate Industries SuDS offering, please contact us at [email protected] Bardon Hall, Bardon Drive, Copt Oak Road, Markfield LE67 9PJ

T: 01530 510066 [email protected]

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© Aggregate Industries UK Ltd 2019. Registered address: Bardon Hall, Copt Oak Road, Markfield, Leicestershire, LE67 9PJ. No: 00245717.